Do you need something internal, or would external work for you as well?

If external is fine, I’d recommend the Schiit Magni 2 and Modi 2, affectionately known as the Schiit Stack. The Magni 2 has plenty enough power to drive most headphones on the market and the Modi 2 is a good DAC. Since they are separate units it’s easy to swap one or the other out in the future if desired.

TL;DR: Both would be best, but the Magni 2 at the very least would be good.

The Modi 2 is a DAC, a Digital to Analogue Converter, so in the case of the Modi 2 it will convert the digital signal coming from your computer into an audio signal. It will essentially clear up any static or other electrical noise coming from your PC, providing a much cleaner audio signal.

The Magni 2 is an amplifier, and as the name implies, it amplifies the audio signal that it is receiving and putting out a more powerful signal. It’s kinda like putting a turbo in a car. The car (audio signal) will be the same overall, but the turbo (amplifier) makes it harder/better/faster/stronger. In my opinion the amplifier will make the most difference in perceived audio quality.